Study on the influence of topography on wind shear-numerical simulation based on WRF-CALMET

IF 1.8 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Geoscientific Instrumentation Methods and Data Systems Pub Date : 2024-03-22 DOI:10.5194/egusphere-2024-609

Xingyu Wang, Yuhong Lei, Baolong Shi, Zhiyi Wang, Xu Li, Jinyan Wang

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Abstract

Abstract. This study focuses on the critical issue of low-altitude wind shear, vital for aircraft safety during takeoff and landing. Using the WRF-CALMET model, we assess the impact of topography on low-level wind shear at Zhongchuan Airport. CALMET outperforms WRF, showing improved simulation accuracy. CALMET's simulation highlights diurnal variations in vertical wind shear, especially pronounced from 13:00 to 24:00. Notably, CALMET indicates 1–2 hazard levels higher wind shear for aircraft operations compared to WRF in a significant area. Terrain sensitivity experiments reveal CALMET's responsiveness to terrain changes during high wind shear periods, with reduced impact at higher altitudes. CALMET's incorporation of kinematic terrain influences, blocking effects, slope flow, and strengthened diversion of near-surface airflow on complex terrain contribute to these findings. This study confirms the efficacy of CALMET in simulating low-altitude wind shear, emphasizing its superiority in capturing terrain influences and reducing the aviation safety threat posed by low-altitude wind shear.

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地形对风切变的影响研究--基于 WRF-CALMET 的数值模拟

摘要低空风切变对飞机起飞和着陆时的安全至关重要。利用 WRF-CALMET 模型，我们评估了地形对中川机场低空风切变的影响。CALMET 的模拟结果优于 WRF，模拟精度有所提高。CALMET 的模拟结果突出显示了垂直风切变的昼夜变化，尤其是在 13:00 至 24:00 期间。值得注意的是，与 WRF 相比，CALMET 在相当大的范围内显示飞机运行所需的风切变高出 1-2 个危险等级。地形敏感性实验显示，在高风切变期间，CALMET 对地形变化的反应灵敏，在较高海拔地区影响较小。CALMET 将运动地形影响、阻挡效应、斜坡流以及复杂地形上近地面气流的强化分流纳入其中，有助于得出上述结论。这项研究证实了 CALMET 在模拟低空风切变方面的功效，强调了其在捕捉地形影响和减少低空风切变对航空安全威胁方面的优越性。

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来源期刊

Geoscientific Instrumentation Methods and Data Systems GEOSCIENCES, MULTIDISCIPLINARYMETEOROLOGY-METEOROLOGY & ATMOSPHERIC SCIENCES

CiteScore

3.70

自引率

0.00%

发文量

审稿时长

37 weeks

期刊介绍： Geoscientific Instrumentation, Methods and Data Systems (GI) is an open-access interdisciplinary electronic journal for swift publication of original articles and short communications in the area of geoscientific instruments. It covers three main areas: (i) atmospheric and geospace sciences, (ii) earth science, and (iii) ocean science. A unique feature of the journal is the emphasis on synergy between science and technology that facilitates advances in GI. These advances include but are not limited to the following: concepts, design, and description of instrumentation and data systems; retrieval techniques of scientific products from measurements; calibration and data quality assessment; uncertainty in measurements; newly developed and planned research platforms and community instrumentation capabilities; major national and international field campaigns and observational research programs; new observational strategies to address societal needs in areas such as monitoring climate change and preventing natural disasters; networking of instruments for enhancing high temporal and spatial resolution of observations. GI has an innovative two-stage publication process involving the scientific discussion forum Geoscientific Instrumentation, Methods and Data Systems Discussions (GID), which has been designed to do the following: foster scientific discussion; maximize the effectiveness and transparency of scientific quality assurance; enable rapid publication; make scientific publications freely accessible.